scholarly journals EVALUATION OF ANTIOXIDANT, ANTIBACTERIAL, AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY ANALYSIS OF ETHYL ACETATE EXTRACT OF STREPTOMYCES OMIYAENSIS SCH2

Author(s):  
Janpen Tangjitjaroenkun

Objective: The aim of this study was to evaluate the antibacterial and antioxidant properties of ethyl acetate extract of Streptomyces omiyaensis SCH2. The chemical constituents of the extract were investigated using gas chromatography-mass spectrometry (GC-MS).Methods: Secondary metabolites from S. omiyaensis were produced by submerge fermentation using ISP2 medium with 3% NaCl (w/v) for 21 days. The culture filtrate was extracted with ethyl acetate. The chemical constituents were detected in the GC-MS analysis. Antibacterial activity was performed using disc diffusion and broth microdilution methods. Antioxidant activity was evaluated by determining the reducing power capacity and free radical scavenging assays.Results: The GC-MS analysis of the SCH2 extract revealed the presence of four compounds. The main constituents were 2-phenylacetamide (79%). The extract exhibited the highest zone of inhibition against some pathogenic bacteria such as Enterobacter cloacae, Klebsiella pneumoniae, and Bacillus subtilis. In addition, the lowest minimum inhibitory concentration (IC) and minimum bactericidal concentration values of extract were obtained for E. cloacae (0.125 and 4 mg/ml). The extract showed antioxidant potential with IC50 values of 2.078.13±24.58 μg/ml and 475.74±4.56 μg/ml for 2,2-diphenyl-1-picryl-hydrazyl and 2,2′-azino-bis[3-ethylbenzothiazoline-6-sulphonic acid] assays, respectively. The ferric reducing antioxidant power value of extract was 110.36±1.75 mmol FeSO4.7H2O/g extract.Conclusion: This study indicated that S. omiyaensis extract possesses antibacterial and antioxidant activities. GC-MS analysis revealed the presence of major chemical constituents, acetamide, and pyrrolopyrazine which could be responsible for the biological activities. S. omiyaensis extract could be used as a potential of natural antibacterial and antioxidant agents for pharmaceutical and medical applications.

2019 ◽  
Vol 9 (2) ◽  
pp. 28-30
Author(s):  
Kalpana Garg ◽  
Birendra Shrivastava ◽  
Anurag Bhargava

Introduction: To identify the various phytoconstituents present in the plant Sphaeranthus indicus by using gas chromatography and mass spectrometry. Meth­ods: The fruits of Sphaeranthus indicus were extracted with Different solvents of increasing polarity. The methanol and ethylacetate extract were subjected to GCMS analysis to detect the phytoconstituents. Results: Totally 26 compounds were identified. Among these 13 constituents in methanol extract and 13 constituents in ethylacetate extract were identified during the GC-MS analysis. Stigmasterol and lupeol which were identified in the plant is considered to have antiarthritic properties. Keywords: Sphaeranthus indicus, Gas chromatography, Mass spectrometry.


Author(s):  
Kamana Sahani ◽  
DEEPENDRA THAKUR

Objective: The objective of the present investigation was to perform the Gas Chromatography-mass spectrometry (GCMS) analysis of endophytic fungi Curvularia aeria MTCC-12847 isolated from Tribulus terrestris L. to find out the active compound present in the extract. Methods: The endophytic fungi were isolated from the plant Tribulus Terrestris L., leaf which was cultivated in optimized media for the production of secondary metabolites and was extracted using ethyl acetate. Ethyl acetate extract was used for the Gas Chromatography-mass spectrometry (GCMS) analysis. Results: GC-MS analysis of ethyl acetate extract of endophytic fungi revealed the presence of various secondary metabolites, the highest amount present was Palmitic acid (24.54%) and Lowest was Dimethyl 1-phenyl-7-methyl-1-hydroxy-1,4-dihydronaphthalene-2,3-dicarboxylate (5.76%). Conclusion: The endophytic fungal Curvularia aeria MTCC-12847 extract isolated from the Tribulus terrestris L. shows the presence of various bioactive compounds.


Author(s):  
Krishnavignesh L Krishnavignesh ◽  
Mahalakshmipriya A ◽  
Ramesh M

  Objective: Continued resistance toward the antibiotics urges us to explore newer antibiotics. Plants are being the safer source of antibiotics with lesser or no side effects. This study was designed to study the presence of phytochemical constituents and antibacterial activity of leaf and flower extracts of Wedelia glauca against urinary tract infection causing pathogens.Methods: The plant leaves were extracted with five different solvents based on the polarity. The extraction was done using soxhalation. Antimicrobial activity was determined by agar well diffusion method for both the sample and standard. The acetone plant extract was subjected to gas chromatography-mass spectrometry (GC-MS) analysis for screening phytoconstituents.Results: Preliminary phytochemical screening revealed the presence of diverse phytoconstituents in the plant. The different extracts exhibited a considerable antimicrobial potential. Among the solvents used acetone extract showed comparably better antimicrobial activity with 100% of inhibition rate with the maximum zone of inhibition of 1.6±0.77 mm against Staphylococcus sp. and Aspergillus sp. at the concentration of 5 mg. GC-MS analysis provided 8 major peaks which revealed the existence of a variety of bioactive compounds which may attribute to the efficacy of the plant.Conclusion: W. glauca leaf and flower extracts displayed a broad spectrum of antibacterial and antifungal activity and can be considered as a potential source of newer antibiotic compounds.


Author(s):  
ELAVARASAN SATHYA ◽  
THANGAVEL SEKAR

Objective: Andrographis lawsonii Gamble is a medicinal herb species, Endemic to India: Karnataka (Dakshina kannada or south Canara district), Kerala (Palakkad district), and Tamil Nadu (Coimbatore and Nilgiris districts). The Andrographis is a large genus of the family Acanthaceae. This study focused to check the preliminary phytochemical nutritive analysis, leaf stem and root and gas chromatography-mass spectrometry (GC-MS) analysis leaf methanol extract. Methods: The plant samples were subjected to Soxhlet extraction for phytochemical analysis and further experimental studies. The test on phytochemical studies indicated the presence of alkaloids, saponins, glycosides, and flavonoids glycosides within the plant parts, respectively. The estimation of carbohydrate protein starch methanol leaves extracts to have high activity compared to others. Results: Preliminary phytochemical and Nutritional analysis in A. lawonii. Nutritional analysis in carbohydrate protein and starch content was found to be high in leaf methanol extract. Highly medicinal compound analysis in this GC-MS Analysis 50 compound present in methanol leaf extract. Conclusion: The leaf methanol extract of A. lawsonii has exhibited remarkable preliminary phytochemical analysis and nutritional analysis GC-MS analysis to the medicinal plant.


Author(s):  
ADEKOLA MB ◽  
AREOLA JO ◽  
ORIYOMI OV ◽  
APATA JT ◽  
APALOWO OE ◽  
...  

Objective: The objective of the study was to evaluate brine shrimp lethality of Blighia sapida stem-bark extract and its fractions and identify the bioactive constituents in the ethyl acetate fraction (EAF) using gas chromatography-mass spectrometry (GC-MS) technique. Methods: The ethanol extract (EE) and its fractions were subjected to lethality assay, and GC-MS analysis of EAF was carried out. Results: The lethality test showed a concentration-dependent mortality rate in the brine shrimp nauplii for the EE and its fractions. GC-MS analysis of EAF of the extract revealed the existence of 13 peaks of the GC-MS chromatogram with only one prominent compound, n-hexadecanoic acid (peak area of 10.13%). Conclusion: The result revealed the presence of 13 bioactive components in the EAF of the extract, the majority of which have been reported for different biological activities, hence, justifies the use of the plant in the treatment and management of different diseases ethnomedicinally.


2019 ◽  
Vol 10 (4) ◽  
pp. 2705-2710
Author(s):  
Nurul Najwa Zamimi ◽  
Noorhazayti Ab. Halim ◽  
Deny Susanti Darnis ◽  
Widya Lestari ◽  
Md Muziman Syah Md Mustafa

Sargassum polycystum is a brown seaweed, which has been reported to contain various phytoconstituents especially antimicrobial properties. However, the study on phytochemical components and biological activities of S. polycystum are yet fully understood. Therefore, the objectives of this study are to evaluate the best extraction solvents for S. polycystum and to determine the percentage of phytocomponents obtained in the n-hexane, dichloromethane (DCM) and methanol extracts of S. polycystum via Gas Chromatography-Mass Spectrometry (GC-MS) analysis. S. polycystum was collected from the coastal area of Sabah, Malaysia. After collection, it was rinsed, dried and extracted with n-hexane, DCM and methanol by soxhlet extraction. The fatty acid compounds (FAME) analysis was done using The Perkin Elmer Turbo Mass Spectrometer.  This study showed that methanol is the most efficient solvent as it produced the highest extraction yield with 3.83%, followed by n-hexane with 1.69% and lastly DCM with 0.59% in S. polycystum. On top of that, this study has found 19 phytocomponents in all extraction methods of S. polycystum, which have been proven to possess antibacterial constituents such as palmitic acid, myristic acid, oleic acid, pentadecanoic acid and behenic acid as assessed by GC-MS analysis.


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